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Configure local yum on docker container

Configure local yum on docker container.
Below are the simple steps to configure local yum using RHEL8 iso in docker container-
Step 1 - Mount your ISO on your (Docker)local system
[root@server109 ~]# mkdir /iso
[root@server109 ~]# mount -o loop /RHEL-8-0-0-BaseOS-x86_64.iso /iso
[root@server109 ~]#

 Step 2 - Launch a container
[root@server109 _data]# docker container run -dit --name yum -v /run/media/root/RHEL-8-0-0-BaseOS-x86_64/:/iso  centos:7
a3483d2b718f339f6c3e9a4600e27e61086af512ef6bca67fcc1b73ada70838c

-dit - Tags(Detach, Interactive, Terminal )
--name yum - Name of container
-v /run/media/root/RHEL-8-0-0-BaseOS-x86_64/:/iso - /iso here dvd will bind on container
centos:7 - Name of container image:version

Step 3 - Attach container
[root@server109 _data]# docker container attach yum
[root@a3483d2b718f /]# cd /iso/
[root@a3483d2b718f iso]# ls
AppStream  BaseOS  EFI  EULA  GPL  RPM-GPG-KEY-redhat-beta  RPM-GPG-KEY-redhat-release  TRANS.TBL  extra_files.json  images  isolinux  media.repo

RPM packages are available under AppStream  and BaseOS directories, now we can configure yum very easily. Before that let's check how many packages are available from by default yum configuration -
[root@872e373dcd53 /]# yum repolist |grep repolist
repolist: 12225

Step 4 - Configure local yum
[root@a3483d2b718f iso]# cd /etc/yum.repos.d/
[root@a3483d2b718f yum.repos.d]# ls
CentOS-Base.repo  CentOS-CR.repo  CentOS-Debuginfo.repo  CentOS-Media.repo  CentOS-Sources.repo  CentOS-Vault.repo  CentOS-fasttrack.repo
[root@a3483d2b718f yum.repos.d]# rm -rf  *.repo
[root@a3483d2b718f yum.repos.d]# ls
[root@a3483d2b718f yum.repos.d]#
[root@a3483d2b718f yum.repos.d]# vi myyum.repo
[dvd]
name = dvd1
baseurl=file:///iso/AppStream
gpgcheck=0

[dvd]
name = dvd2
baseurl=file:///iso/BaseOS
gpgcheck=0
[root@a3483d2b718f yum.repos.d]# yum repolist |grep repolist
repolist: 6647

That's all, your local yum has been configured!!
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